Was a tricky day for a 1st timer, for sure, so totally understand you PoV, TwinFan.
There were too many cars for the National layout - But i do see it from both sides and people want to have the opportunity to attend the event and also the club wants to make money, particularly in uncertain times such as now.
Having an event with super low numbers might be good for the few - but are they willing to pay even more.. a 1/3 more or 1/2 more to ensure that club can cover the cost of hire with such low numbers? and then with such a big membership.. who will be the lucky few that get to go?
The main issue IMO is that people are not adhering to the rules on both sides.
Overtaking should be on the straights or safe overtaking zones only (not in a corner and not in braking), person being overtaken MUST lift a bit to allow the overtake to happen safely and quickly.
If we have overtaking by consent only... the person being overtaken MUST be observant enough to acknowledge the car behind and grant consent for the overtake at the next safe overtaking zone. (e.g as mentioned after old Hairpin is a good overtaking zone which isn't a typical straight..... through Craners is not!)
People doing the overtaking should recognise where they think they might catch the car in front and judge their pace accordingly so that when you arrive at the car in front - you can overtake quickly and safely and you don't have to set behind getting frustrating and effectively pushing someone into a mistake, and doing something rash yourself.
You can't expect the slower car to just vanish because you arrived, similarly, The slower person should not keep the quicker person behind them for several corners unnecessarily as this is when the trains develop.
Learning when to lift and slipstream back in was one of the best skills i've been able to pick up, that allowed me to run at my own pace and build a rhythm, without holding anyone else up. Car positioning is key, to get back on the line and claim the next corner(s) before allowing the next people through at the next overtaking zone... its just defensive driving skills and car/body language.
As i've built pace, I've learnt to try to look further and further ahead and anticipate my pace and when/where I might catch some one, so that I can plan the overtake to be safe and quick without a major disruption.
It isn't racing, and it is supposed to be fun... and club days will have a wide range of cars and drivers.
For club days, which are fun days, social, chit-chat, blah-blah - I tend to dial it back a bit and build pace as traffic get less.
If there is alot - then back off a little and just work on a sector at a time and have my fun that way... then hopefully later in the day, I can put some quicker full laps together based on learning earlier in the day.
As has been said... everyone has paid their money. Some want to go faster, some go slower... both can work together.